IPv6 Lookup Tool
The IPv6 Info tool provides a complete set of IPv6 address information.
The IPv6 Info tool provides WHOIS information, Autonomous System Number (ASN) information, expanded and compressed IP address information, and reverse lookup information for an IPv6 address. It also includes CIDR/netmask information for your IPv6 address. Note that due to the relatively small actual use of IPv6 addressing, ASN, WHOIS, and reverse lookup information may not be available.